Quote from: znort987 on September 15, 2011, 03:33:13 PM

Quote from: sunbird on September 15, 2011, 02:58:15 PM

Hi all,

I've got a little bit of a different problem, but thought I'd post here since it concerns a 5970 card.

I'm running ubuntu 11.04 with ati-sdk 2.4 and catalyst 11-8. mining is working on each core, but if i run workers on both cores at the same time, the hash rate drops by 50%. Do I need to get dummy plugs? Or is something else going on?

Once I get both cores working independently of each other, I'll work on upping the hash rate.

Any help appreciated!

There's no never been a need for dummy plugs on Linux.
Try to use cgminer. It should detect all cores at once and
mine on all of them. If a core doesn't get detected, you'll
know at once.

Hi,

Thanks for the response. Actually, the problem is not with detection:

Code:

[0] Cypress
[1] Cypress
[2] AMD Sempron(tm) 145 Processor

When I run a phoenix miner on device0, i get ~ 316 Mhash/sec and loads on Device0=99%. But when I start a second phoenix miner on device1, it starts, works fine, but I get this result on the miner running on Device0:

Code:

Kernel error: Unusual behavior from OpenCL. Hardware problem?

And the loads look like this:

Code:

# aticonfig --odgc --adapter=ALL

Adapter 0 - ATI Radeon HD 5900 Series
   Core (MHz) Memory (MHz)
   Current Clocks : 750 300
   Current Peak : 750 300
  Configurable Peak Range : [550-1000] [1000-1500]
   GPU load : 60%

Adapter 1 - ATI Radeon HD 5900 Series
   Core (MHz) Memory (MHz)
   Current Clocks : 750 300
   Current Peak : 750 300
  Configurable Peak Range : [550-1000] [1000-1500]
   GPU load : 38%

I can run either miner independently of the other without getting the error. Also, FWIW, I have crossfire chains disabled:

Code:

# aticonfig --lsch
No CrossFire chains defined

Also, I will go ahead and install cgminer... maybe all the problems will go away! I'll report back after I do so.

Okay, here's my cgminer install, which is working, but no better than the other miners:

Code:

cgminer version 2.0.2 - Started: [2011-09-15 21:33:41]
--------------------------------------------------------------------------------
(5s):335.9 (avg):322.1 Mh/s | Q:29 A:0 R:18 HW:0 E:0% U:0.00/m
TQ: 2 ST: 2 SS: 0 DW: 0 NB: 1 LW: 0 GF: 0 RF: 0 I: 4
Connected to http://localhost:8332 without LP as user XXXXXXXX
Block: 000008152519c654c5385277c7576405... Started: [21:33:41]
--------------------------------------------------------------------------------
[P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
GPU 0: 55.0C 2884RPM | 123.8/120.2Mh/s | A:0 R:5 HW:0 U:0.00/m
GPU 1: 210.0/203.6Mh/s | A:0 R:13 HW:0 U:0.00/m
--------------------------------------------------------------------------------

[2011-09-15 21:36:54] Rejected 7de7f450 GPU 0 thread 2
[2011-09-15 21:37:01] Rejected 83eb721b GPU 1 thread 3
[2011-09-15 21:37:09] Rejected 02a39c4f GPU 1 thread 3
[2011-09-15 21:37:13] Rejected 2b90d8b4 GPU 1 thread 1